ISD5008
SINGLE-CHIP,
VOICE RECORD / PLAYBACK DEVICE
4-, 5-, 6- AND 8-SECOND DURATION
Publication Release Date: May, 2005
Revision 0.1
ISD5008
Single-Chip Voice Record/Playback Device
4-, 5-, 6-, and 8-Minute Durations
Preliminary Datasheet
ISD5008 PRODUCT SUMMARY
The ISD5008 ChipCorder product is a fully-inte-
grated, single-chip solution which provides seam-
less integration of enhanced voice record and
playback features for digital cellular phones (GSM,
CDMA, TDMA, PDC, and PHS), automotive com-
munications, GPS/navigation systems, and porta-
ble communication products. This low-power, 3-
volt product enables customers to quickly and
easily integrate 4 to 8 minutes of voice storage
features such as one-way and two-way (full du-
plex) call record, voice memo record, and call
screening/answering machine functionality.
Like other ChipCorder products, the ISD5008 inte-
grates the sampling clock, anti-aliasing and
smoothing filters, and the multi-level storage array
on a single-chip. For enhanced voice features,
the ISD5008 eliminates external circuitry by also in-
tegrating automatic gain control (AGC), a power
amplifier/speaker driver, volume control, sum-
ming amplifiers, analog switches, and a car kit in-
terface. Input level adjustable amplifiers are also
included, providing a flexible interface for multiple
applications.
Figure: ISD5008 Block Diagram
FTHRU
6dB
INP
FILTO
CHIP SET
ANA
OUT
AMP
1
ANA OUT MUX
ANA OUT+
ANA OUT-
MICROPHONE
MIC+
MIC -
AGCCAP
AUX IN
1.0/1.414/2.0/2.828
MIC IN
INP
SUM1 MUX
AGC
(AGPD)
1
Σ
2
SUM1
Summing
AMP
SUM1
ARRAY
1
SUM1
Input Source MUX
Low Pass
Filter
1
FILTO
ANA IN
2
Σ
)
SUM2
Summing
AMP
VOL
SUM2
Filter
Filter
MUX
(AOPD)
3
FILTO
ANA IN
ARRAY
(
S1M0
)
S1M1
(FLS0)
(FLPD)
CAR KIT
AUX IN
(
Internal
Clock
2
S2M0
S2M1
AUX IN
AMP
(INS0)
1
1
( )
AOS0
AOS1
AOS2
SUM1 MUX
(AXPD)
2
(
AXG0
AXG1
2
)
(
S1S0
)
S1S1
Multilevel
Storage Array
FILTO
CAR KIT
AUX
OUT
AMP
XCLK
0.625/0.883/1.25/1.76
(
FLD0
)
FLD1
AUX OUT
Output MUX
VOL
SUM2
SPEAKER
Spkr.
AMP
CHIP SET
ANA IN
SP+
SP-
ANA IN
AMP
(AIPD)
1
ANA IN
2
SUM1
INP
ANA IN
SUM2
Volume
Control
3
(
1
OPS0
OPS1
)
2
Vol MUX
(
OPA0
)
OPA1
2
(
AIG0
)
AIG1
Power Conditioning
2
( )
VOL0
VOL1
VOL2
(VLPD)
(
VLS0
)
VLS1
Device Control
V
CCA
V
SSA
V
SSA
V
SSA
V
SSD
V
SSD
V
CCD
V
CCD
SCLK SS MOSI MISO INT
RAC
August 2000
ISD · 2727 North First Street, San Jose, CA 95134 · TEL: 408/943-6666 · FAX: 408/544-1787 · http://www.isd.com
ISD5008 Product
Duration/sample rate selection is accomplished
via software, allowing customers to optimize qual-
ity and duration for various features within the
same end product.
The ISD5008 device is designed for use in a micro-
processor- or microcontroller-based system. Ad-
dress, control, and duration selection are
accomplished through a Serial Peripheral Inter-
face (SPI) or Microwire Serial Interface to minimize
pin count.
Recordings are stored in on-chip nonvolatile
memory cells, providing zero-power message
storage. This unique, single-chip solution is made
possible through ISD’s patented multilevel storage
technology. Voice and audio signals are stored
directly into solid-state memory in their natural, un-
compressed form, providing superior quality voice
and music reproduction.
ENHANCED VOICE FEATURES
•
•
•
•
•
•
•
One or two-way (full duplex) conversation
record (record signal summation)
One- or two-way (full duplex) message
playback (while on a call)
Voice memo record and playback
Private call screening
In-terminal answering machine
Personalized outgoing message (given caller
ID information from host chip set)
Private call announce while on call (given
CIDCW information from host chip set)
EASY-TO-USE AND CONTROL
•
•
No compression algorithm development
required
User-controllable sample rates of 8.0 kHz,
6.4 kHz, 5.3 kHz, or 4.0 kHz providing up to
8 minutes of voice storage.
Microcontroller SPI or Microwire™ Serial
Interface
Fully addressable to handle multiple
messages in 1200 rows
ISD5008 FEATURES
FULLY-INTEGRATED SOLUTION
•
•
•
Single-chip voice record/playback solution
Integrated sampling clock, anti-aliasing and
smoothing filters, and multi-level storage array
Integrated analog features such as automatic
gain control (AGC), audio gating switches,
speaker driver (23mW with 8 ohm load),
summing amplifiers, volume control, and an
AUX IN/AUX OUT interface (e.g., for car kits).
•
•
HIGH QUALITY SOLUTION
•
•
•
High quality voice and music reproduction
ISD’s standard 100-year message retention
(typical)
100,000 record cycles (typical)
LOW-POWER CONSUMPTION
•
•
Single +3 volt supply
Operating current:
I
CC Play
= 15 mA (typical)
I
CC Rec
= 25 mA (typical)
I
CC Feedthru
= 12 mA (typical)
Standby current:
I
SB
= 1 µA
OPTIONS
•
•
Available in die form, PDIP, SOIC, TSOP, and
chip scale packaging (CSP)
Compact µBGA chip scale package
available for portable applications
Extended temperature (-20 to +70°C) and
industrial temperature (-40 to +85°C) versions
available
•
•
•
•
Power consumption controlled by SPI or
Microwire control register
Most stages can be individually powered
down for minimum power consumption
ii
Voice Solutions in Silicon
™
Table of Contents
1
DETAILED DESCRIPTION ................................................. .................... 1
1.1
Speech/Sound Quality ...................................... .................... 1
1.2
Duration ............................................................ .................... 1
1.3
Flash Storage .................................................... .................... 1
1.4
Microcontroller Interface ....................................................... 1
1.5
Programming .................................................... .................... 1
PIN DESCRIPTIONS ........................................................ .................... 2
2.1
Digital I/O Pins ................................................... .................... 2
2.2
Analog I/O Pins .................................................. .................... 3
2.3
Power and Ground Pins .................................... .................... 6
INTERNAL FUNCTIONAL BLOCKS .................................... .................... 7
SERIAL PERIPHERAL INTERFACE (SPI) DESCRIPTION .......... .................... 13
4.1
Message Cueing .............................................. .................... 13
4.2
Power-Up Sequence ......................................... .................... 14
4.3
SPI Port .............................................................. .................... 15
4.4
SPI Control Register ........................................... .................... 15
OPERATIONAL MODES DESCRIPTION ............................. .................... 21
5.1
Feed Through Mode ......................................... .................... 21
5.2
Call Record ...................................................... .................... 23
5.3
Memo Record .................................................. .................... 24
5.4
Memo and Call Record Playback .................... .................... 24
TIMING DIAGRAMS ....................................................... .................... 34
DEVICE PHYSICAL DIMENSIONS ..................................... .................... 36
ORDERING INFORMATION ........................................... .................... 42
2
3
4
5
6
7
8
ISD5008 Product
1
1.1
DETAILED DESCRIPTION
SPEECH/SOUND QUALITY
1.3
FLASH STORAGE
The ISD5008 ChipCorder product can be config-
ured via software to operate at 4.0, 5.3, 6.4, and
8.0 kHz sampling frequencies, allowing the user a
choice of speech quality options. Increasing the
duration decreases the sampling frequency and
bandwidth, which affects sound quality. Table 1
compares filter pass band and product durations.
The speech samples are stored directly into on-chip
nonvolatile memory without the digitization and
compression associated with other solutions. Di-
rect analog storage provides a natural sounding
reproduction of voice, music, tones, and sound
effects not available with most solid-state solu-
tions.
One of the benefits of ISD’s ChipCorder technology
is the use of on-chip nonvolatile memory, which pro-
vides zero-power message storage. The message
is retained for up to 100 years (typically) without
power. In addition, the device can be re-record-
ed over 100,000 times (typically).
1.4
MICROCONTROLLER INTERFACE
1.2
DURATION
A four-wire (SCLK, MOSI, MISO, SS) SPI interface is
provided for ISD5008 control, addressing func-
tions, and sample rate selection. The ISD5008 is
configured to operate as a peripheral slave de-
vice with a microcontroller-based SPI bus inter-
face. Read/Write access to all the internal registers
occurs through this SPI interface. An interrupt sig-
nal (INT) and internal read-only Status Register are
provided for handshake purposes.
To meet end system requirements, the ISD5008
device is a single-chip solution which provides
from 4 to 8 minutes of voice record and playback,
depending on the sample rates defined by cus-
tomer software.
1.5
PROGRAMMING
Table 1:
Input Sample
Rate (kHz)
8.0
6.4
5.3
4.0
Input Sample Rate to Duration
Duration Typical Filter Pass Band
(Minutes)
(kHz)
4.0
5.0
6.0
8.0
3.4
2.7
2.3
1.7
The ISD5008 series is also ideal for playback-only
applications, where single or multiple message
Playback is controlled through the SPI port. Once
the desired message configuration is created, du-
plicates can easily be generated via an ISD or
third-party programmers. For more information on
available application tools and programmers
please see the ISD web site at www.isd.com.
ISD
1
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